Portable vulcanizer for tire-repairs



w. H. WELCH. PORTABLE VULCANIZER FOR TIRE REPAIRS.

APPLICATlON FILED MAR. l, 1920.

Patented Nov. 30, 1920.

IIVJICIIT II|HI|H Illlll' UNITED STATES PATENT OFFICE.

WALTER HENRY WELCH, F BRISTOL, ENGLAND,'ASSIGNOR TO HARVEY FROST @c COMPANY, LIMITED, OF -LONDON', ENGLANMD.

PORTABLE VULCANIZERr FOR TIRE-REPAIRS.

` To 'all whom t may concern:

vBe it known that 1 WALTER HENRY WELoiLa' subject of the King of England, residing'jat Bishopston, Bristol," in Athe county of Gloucester, vEngland, have invented lcertain new :and usefulV Improvements in Portable Vulcanizers 'for Tire- Repairs, of which the following is a speci- This invention is yifor improvements in or relating to portable'vulcanizers `for tire-repairs and has Jfor its object to provide a speciic construction of .vulcanizer ywhich shall be compact in orm,.can be used in various positions and is adapted for effecting repairs around valve-stems or in inner tubes or covers.

' According, to this invention a portable vulcanizer comprises a steam generating chamber having an internal strut between `the wall'which provides or supports the op- *erating face and the oppositev wall,'wliich Vstrut is webbedto strengthenthe walls, has

an open way through it Yfrom the outside of one wall to the outside of the other,"and is lshaped to receive a resilient stem constituting the holding-piece of a molding-plate, so that the said cored strut will serve the ltreble purpose of strengthening the generating chamber, accommodating the stems of valves when effecting` repairs around vthe Vvsame, and as securing means for moldingplates of different patterns.

In the accompanying drawings which illustrate this invention lFigure 1 isa side elevation of the-vulcanizer;

Fig. 2 is a theY operative face base; and Y Y Fig. l is a perspective view of one of the molding-plates.`

The saine letters indicate the same parts throughout lthe drawings.

rl`he vulcanizer A isv of rectangular crosssection andl is divided'V into upper and lower chambers, the upper Vone constituting a steam-generating chamber A1 and the lower one -a cut-out chamber A2. The wall for the chamber A2 may be separately attached to .the ybottomV of the steam-generating chamber and is thusshown in the drawings; the

cover-plate s y "bottom ofthe chamber A2 is closedin by a ,55, Y

Fig. 3 is a view. of the same, from the v Specification of Letters Patent. Patented Nov. 30, 1920. Application filed March 1, 1920.' Serialy No. 362,175. v

In the `interior of the steam-generating chamber' is a cross-strut'B which extends from the wall A3 which provides the operativeface of the vulcanizer to the'opposite wall A1 andv both of these walls are strengthened with webs B1. The strut B is cored through as shown at B2, the open way thus provided extending from the outer face of-the wall A3 to the outer face of Vthe wall A1.

' Extending up into the generating-chamber A1 isa tubular heating-element is secured to the base'fof the generating- Vchamber byra fiange C1 which is carried on the end of the tubular element and lies to one side of the chamber A2. Beside the flange C1 and in the same chamber is a cutout D. This cut-out, with the flanged heatv,ing-element, can easily be stowed in the l chamber A2provided beneath the steamgenerating chamber. By placing these two elements side by side in the bottom of the chamber little-wiring is required as the two wires C2 and D3 from the'heating-element V(which may be'bead insulated) are connected one to a terminal E1 on the outside of a vulcanizer and the other to a terminal D2 on the one contact-piece of the cut-out.

The terminal D1 for other contact-'piece of the cut-out is `connected by a wire C1 to a terminal E on the outside of the vulcanizer. It will be seen that these wires are short and are alll inclosed in the chamber A2 so that Athere is little to getV out of order and the assemblage of the parts can be quickly can be cheaply made. Y

On thev outside of the vulcanizer and on one side wall of the same, a water-gage glass F is secured. VThis is provided with a central mark indicated at F1 and by being placed obliquely it will indicate whether the vulcanizer contains'suicient water irren spective of the position in which the vulcanizer may be used, a's'the capacity of the steam-generating chamber is such that if it contains the proper quantity of water, it will always register approximately onthe mark F1. It will be seen that the mark is not a mere line and allows forslight variations such as'may occur when the vulcanizer is used in different positions.

The object of the webbed strut B, B1, is to strengthen the walls A3 A4 so that a f cramp'may be applied to the `wall A* to the apparatus Y -isurface lGij-of which .is .iat to vlie lli ush against the `face A3 andthe opposite `surface press the wall A3 against the work to be vulcanized. The throughway B is of such dimensions as to accommodate. a valv `e stem when repairs are being made around the same so that the inner tibefc'anbe vbrought also of such shape, *in this case circular vin piece of a molding-plate'.

In F ig. 4,a moldigaplate Gisrshown, one

G2 is curved Vto it the Vcurvature of al tirecover yand patterned to conform with the fouter configuration l.of vthe tire.V Secured to the back o f thisfplate is a tubular holderGr3 which isslotted withjV-shaped slots t0 Arender it resilient,and `this is made a spring fit in the throughway B2 of the `internal strut B. Any molding-plate can/thus beV readily placed in position-by l pushing its holdingfpiece G3 into the hole B2 `and the curved .face of the Amolding-pla tev then becomes ,the operative sur-face of the VvulcaniZer. v

The jvulcanizer, constructed vas described is.. easy to manu-facture, is compact, servesa largenumber o f purposes, -andcan be used in various positions without: Vfear of 'the heating-element not being immersed provided the waterflevel is maintained .atthe I pmarkj shown on the gage.v

The -lat .formjoi cut-out `shown invthe drawings urthers, the compactnessbit' the apparatus'as by this means little depth is required the chamber A? and its arrangement close beside f the end ci the. heat Wing-element (l, C1, reduces the wiring'ito a minimum. a.,

-It will be seen'that the stem' G3 ofthe molding-plate is held vitrictionally `in the .orifice B2- and obviousl other devices can be employed insteadfojt this which will also be frictionally-engaged in the said -orilic es, for exam-ple, the, stem maybe in the formpf a plain tube fitting snugly in theV orifice :and .it may be yprovided with two spring-controlled balls projecting laterally'from the `tifibfe' which engage lan internal circumferen- .tialV channel in the'cored orilice `B2 .so that when the stein is ypushed in, the balls snap l:intothe channel in the well-.known manner and-will' thus frictionally engage the stem.

with the vulcanizer. Whatever frictional ldevice iseinployechthe orifice B2 must beso i shaped and dimensioned as to givethe required grip without positively lockingthe stem in the orifice.

What I claim as iny invention and desire to secure `as Letters Patent,is:

l. In a portable vulcani-ze'r,'the combina- .;ti'on of a chamber having an :outer heating :face oni one wallthereoland containing a l, 'striit arranjgedgbetw'een said -lace andthe opposite wall, Iwhichstrut is webbed to :pur-peserdescribed. p into close contact with the face A3 and itis Y Y ysaid heating element, Vsubstantially as and Ystrengthen said walls and has a thoroughway extending from said face to the outside or' 4the said opposite wall, andmeans tor generating steam in said chamber, for the 2. In a portablevulcanizer, the combinalticiiffol'lla*chamber having an outer heating tion oa casinghaving a partition-dividing the saine-into a steamgenerating 4chamber 85 and a cut-out` chamber, said steam-generat- Lingcharnberhaving an outer f'heating face on'lone wall theneofgand containing a strut arranged between said face andthe opposite wall, whichstrut is webbed to .strengthen V said walls and has a throughway extending from said face tothe outside of the said opposite wall, a heatingelement having a lianged base mounted on said partition fin saidcutfout chamber and' extending into saidstearn-'generating chamber, and a cut-k Y out deviceofliat forinmounted jon said partition :and .Y operatively" connected with for the purpose described.

j fl. In a portablevulcanizer, the combinatijon'o' a chamber of rectangular cross-'secti'on hay-ing van outer. operative heating face 4on the -frontwallthereof and containing a vstrut arranged between the front .and rear walls, which strut is webbedtocstrengthen said walls and has -athrou'ghway extending from said face to 'the outside o-'the rear wall, a water-gageinunted diagonally on one sidewallqf the chamberfand .having its ends opening into the same, one end-.relatively njearyto the saidwfront wall and the other relatively near to the said rear wall, at opposite' sides; of lsaidstrut, andmeans for generating steam in said chamber, for the purpose described.

5. In a portable vulcanizer, .the combination ofa casing of: rectangular cro'ssfsection having a partitio n. divid.i;ng. the saineinto a larger steamsgenerating chamber andY a V smaller cut-out` chamber., z said steam-generating chamber having an .outer operative heating face Ion the ient wall thereofand containing .a [strut arranged, between said .face and the rear wall oi: the casing, which' '125" strut is webbedto strengthen said walls and 4has a throughway' extendingthrough Vsaid steam-generating chamberga diagonally-disposed water-gage mounted on one-side wall of the casing and opening into the Vsteam-" 'generating chamber at opposite sides of said strut, a heating-element having a flanged basemounted on said partition in said cutout chamber and extending into said steamgenerating chamber, a cut-outdevice mounted on said partition and operatively connected with said heating-element, and a molding` plate having a Stem adapted to be friotionally held in said throughway With the rear of the plate abutting against said 10 heating face, substantially as and for the purpose described. 

